It made me think... Hypothetically, if some was able to crack a BTC address with key, Do they own the coin?
According to the protocol, they do.
Beyond the ethical ramifications are there laws protecting you if someome randomly clones your private key?
If someone randomly selects the exact same private key with yours (which is immeasurably improbable to happen), then two people have custody of the coins, and either of them can spend them to themselves. No, there is no law that protects you from such scenario.